./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-new/half_true-unreach-call_true-termination.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aa418289 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_651302ab-a5f4-4828-a523-0321e2f47c99/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_651302ab-a5f4-4828-a523-0321e2f47c99/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_651302ab-a5f4-4828-a523-0321e2f47c99/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_651302ab-a5f4-4828-a523-0321e2f47c99/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-new/half_true-unreach-call_true-termination.i -s /tmp/vcloud-vcloud-master/worker/working_dir_651302ab-a5f4-4828-a523-0321e2f47c99/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_651302ab-a5f4-4828-a523-0321e2f47c99/bin-2019/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 14367fbcb63815bbc35abe1c5a8e938762f99ead ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-aa41828 [2018-11-23 12:42:57,132 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-23 12:42:57,133 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-23 12:42:57,139 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-23 12:42:57,139 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-23 12:42:57,140 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-23 12:42:57,141 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-23 12:42:57,142 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-23 12:42:57,143 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-23 12:42:57,143 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-23 12:42:57,144 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-23 12:42:57,144 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-23 12:42:57,145 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-23 12:42:57,145 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-23 12:42:57,146 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-23 12:42:57,147 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-23 12:42:57,147 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-23 12:42:57,148 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-23 12:42:57,150 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-23 12:42:57,151 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-23 12:42:57,151 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-23 12:42:57,152 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-23 12:42:57,154 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-23 12:42:57,154 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-23 12:42:57,154 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-23 12:42:57,155 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-23 12:42:57,155 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-23 12:42:57,155 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-23 12:42:57,156 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-23 12:42:57,157 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-23 12:42:57,157 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-23 12:42:57,157 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-23 12:42:57,158 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-23 12:42:57,158 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-23 12:42:57,158 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-23 12:42:57,159 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-23 12:42:57,159 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_651302ab-a5f4-4828-a523-0321e2f47c99/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-23 12:42:57,165 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-23 12:42:57,166 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-23 12:42:57,166 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-23 12:42:57,166 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-23 12:42:57,167 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-23 12:42:57,167 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-23 12:42:57,167 INFO L133 SettingsManager]: * Use SBE=true [2018-11-23 12:42:57,167 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-23 12:42:57,167 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-23 12:42:57,167 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-23 12:42:57,167 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-23 12:42:57,168 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-23 12:42:57,168 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-23 12:42:57,168 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-23 12:42:57,168 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-23 12:42:57,168 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-23 12:42:57,168 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-23 12:42:57,168 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-23 12:42:57,168 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-23 12:42:57,169 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-23 12:42:57,169 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-23 12:42:57,169 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-23 12:42:57,169 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-23 12:42:57,169 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-23 12:42:57,169 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-23 12:42:57,169 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-23 12:42:57,170 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-23 12:42:57,170 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-23 12:42:57,170 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-23 12:42:57,170 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-23 12:42:57,170 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_651302ab-a5f4-4828-a523-0321e2f47c99/bin-2019/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 14367fbcb63815bbc35abe1c5a8e938762f99ead [2018-11-23 12:42:57,195 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-23 12:42:57,203 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-23 12:42:57,205 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-23 12:42:57,205 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-23 12:42:57,206 INFO L276 PluginConnector]: CDTParser initialized [2018-11-23 12:42:57,206 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_651302ab-a5f4-4828-a523-0321e2f47c99/bin-2019/uautomizer/../../sv-benchmarks/c/loop-new/half_true-unreach-call_true-termination.i [2018-11-23 12:42:57,240 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_651302ab-a5f4-4828-a523-0321e2f47c99/bin-2019/uautomizer/data/0b2cdbf94/1441903a065041a48cdb9e298a6ab3c0/FLAG3236d1138 [2018-11-23 12:42:57,616 INFO L307 CDTParser]: Found 1 translation units. [2018-11-23 12:42:57,617 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_651302ab-a5f4-4828-a523-0321e2f47c99/sv-benchmarks/c/loop-new/half_true-unreach-call_true-termination.i [2018-11-23 12:42:57,620 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_651302ab-a5f4-4828-a523-0321e2f47c99/bin-2019/uautomizer/data/0b2cdbf94/1441903a065041a48cdb9e298a6ab3c0/FLAG3236d1138 [2018-11-23 12:42:57,628 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_651302ab-a5f4-4828-a523-0321e2f47c99/bin-2019/uautomizer/data/0b2cdbf94/1441903a065041a48cdb9e298a6ab3c0 [2018-11-23 12:42:57,630 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-23 12:42:57,631 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-23 12:42:57,632 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-23 12:42:57,632 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-23 12:42:57,635 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-23 12:42:57,635 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:42:57" (1/1) ... [2018-11-23 12:42:57,637 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49ef1641 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:42:57, skipping insertion in model container [2018-11-23 12:42:57,637 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:42:57" (1/1) ... [2018-11-23 12:42:57,643 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-23 12:42:57,654 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-23 12:42:57,752 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 12:42:57,754 INFO L191 MainTranslator]: Completed pre-run [2018-11-23 12:42:57,763 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 12:42:57,771 INFO L195 MainTranslator]: Completed translation [2018-11-23 12:42:57,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:42:57 WrapperNode [2018-11-23 12:42:57,772 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-23 12:42:57,772 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-23 12:42:57,772 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-23 12:42:57,772 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-23 12:42:57,777 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:42:57" (1/1) ... [2018-11-23 12:42:57,780 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:42:57" (1/1) ... [2018-11-23 12:42:57,784 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-23 12:42:57,785 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-23 12:42:57,785 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-23 12:42:57,785 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-23 12:42:57,790 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:42:57" (1/1) ... [2018-11-23 12:42:57,790 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:42:57" (1/1) ... [2018-11-23 12:42:57,791 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:42:57" (1/1) ... [2018-11-23 12:42:57,791 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:42:57" (1/1) ... [2018-11-23 12:42:57,793 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:42:57" (1/1) ... [2018-11-23 12:42:57,796 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:42:57" (1/1) ... [2018-11-23 12:42:57,796 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:42:57" (1/1) ... [2018-11-23 12:42:57,797 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-23 12:42:57,798 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-23 12:42:57,798 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-23 12:42:57,798 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-23 12:42:57,798 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:42:57" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_651302ab-a5f4-4828-a523-0321e2f47c99/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-23 12:42:57,876 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-23 12:42:57,876 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-23 12:42:57,876 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-23 12:42:57,876 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-23 12:42:57,876 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-23 12:42:57,876 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-23 12:42:57,876 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-11-23 12:42:57,876 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-11-23 12:42:58,000 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-23 12:42:58,000 INFO L280 CfgBuilder]: Removed 1 assue(true) statements. [2018-11-23 12:42:58,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:42:58 BoogieIcfgContainer [2018-11-23 12:42:58,001 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-23 12:42:58,001 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-23 12:42:58,001 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-23 12:42:58,003 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-23 12:42:58,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 12:42:57" (1/3) ... [2018-11-23 12:42:58,004 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2033655e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:42:58, skipping insertion in model container [2018-11-23 12:42:58,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:42:57" (2/3) ... [2018-11-23 12:42:58,005 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2033655e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:42:58, skipping insertion in model container [2018-11-23 12:42:58,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:42:58" (3/3) ... [2018-11-23 12:42:58,006 INFO L112 eAbstractionObserver]: Analyzing ICFG half_true-unreach-call_true-termination.i [2018-11-23 12:42:58,014 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-23 12:42:58,019 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-23 12:42:58,031 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-23 12:42:58,056 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-23 12:42:58,056 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-23 12:42:58,057 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-23 12:42:58,057 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-23 12:42:58,057 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-23 12:42:58,057 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-23 12:42:58,057 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-23 12:42:58,057 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-23 12:42:58,057 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-23 12:42:58,071 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2018-11-23 12:42:58,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-11-23 12:42:58,076 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 12:42:58,077 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 12:42:58,078 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 12:42:58,081 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 12:42:58,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1995182865, now seen corresponding path program 1 times [2018-11-23 12:42:58,083 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 12:42:58,083 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 12:42:58,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:42:58,120 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 12:42:58,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:42:58,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:42:58,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 12:42:58,157 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 12:42:58,157 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-23 12:42:58,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-23 12:42:58,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-23 12:42:58,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-23 12:42:58,169 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2018-11-23 12:42:58,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 12:42:58,180 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2018-11-23 12:42:58,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-23 12:42:58,181 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2018-11-23 12:42:58,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 12:42:58,187 INFO L225 Difference]: With dead ends: 33 [2018-11-23 12:42:58,187 INFO L226 Difference]: Without dead ends: 14 [2018-11-23 12:42:58,190 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-23 12:42:58,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-11-23 12:42:58,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-11-23 12:42:58,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-11-23 12:42:58,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2018-11-23 12:42:58,218 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2018-11-23 12:42:58,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 12:42:58,218 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2018-11-23 12:42:58,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-23 12:42:58,218 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2018-11-23 12:42:58,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-11-23 12:42:58,219 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 12:42:58,219 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 12:42:58,219 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 12:42:58,219 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 12:42:58,219 INFO L82 PathProgramCache]: Analyzing trace with hash -2005341596, now seen corresponding path program 1 times [2018-11-23 12:42:58,220 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 12:42:58,220 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 12:42:58,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:42:58,220 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 12:42:58,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:42:58,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:42:58,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 12:42:58,443 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 12:42:58,443 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-11-23 12:42:58,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-23 12:42:58,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-23 12:42:58,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-11-23 12:42:58,445 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 7 states. [2018-11-23 12:42:58,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 12:42:58,529 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2018-11-23 12:42:58,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-23 12:42:58,529 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-11-23 12:42:58,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 12:42:58,531 INFO L225 Difference]: With dead ends: 26 [2018-11-23 12:42:58,531 INFO L226 Difference]: Without dead ends: 21 [2018-11-23 12:42:58,531 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2018-11-23 12:42:58,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-11-23 12:42:58,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 15. [2018-11-23 12:42:58,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-11-23 12:42:58,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-11-23 12:42:58,536 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2018-11-23 12:42:58,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 12:42:58,536 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-11-23 12:42:58,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-23 12:42:58,536 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-11-23 12:42:58,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-23 12:42:58,537 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 12:42:58,537 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 12:42:58,537 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 12:42:58,537 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 12:42:58,537 INFO L82 PathProgramCache]: Analyzing trace with hash -763628086, now seen corresponding path program 1 times [2018-11-23 12:42:58,537 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 12:42:58,537 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 12:42:58,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:42:58,538 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 12:42:58,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:42:58,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:42:58,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 12:42:58,634 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 12:42:58,634 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_651302ab-a5f4-4828-a523-0321e2f47c99/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 12:42:58,642 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 12:42:58,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:42:58,655 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 12:42:58,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 12:42:58,738 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 12:42:58,738 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2018-11-23 12:42:58,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-23 12:42:58,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-23 12:42:58,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2018-11-23 12:42:58,739 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 11 states. [2018-11-23 12:42:58,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 12:42:58,827 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2018-11-23 12:42:58,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-23 12:42:58,827 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2018-11-23 12:42:58,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 12:42:58,828 INFO L225 Difference]: With dead ends: 29 [2018-11-23 12:42:58,828 INFO L226 Difference]: Without dead ends: 21 [2018-11-23 12:42:58,829 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2018-11-23 12:42:58,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-11-23 12:42:58,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2018-11-23 12:42:58,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-11-23 12:42:58,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-11-23 12:42:58,832 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 14 [2018-11-23 12:42:58,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 12:42:58,832 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-11-23 12:42:58,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-23 12:42:58,833 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-11-23 12:42:58,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-11-23 12:42:58,833 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 12:42:58,833 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 12:42:58,833 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 12:42:58,834 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 12:42:58,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1429772124, now seen corresponding path program 2 times [2018-11-23 12:42:58,834 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 12:42:58,834 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 12:42:58,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:42:58,835 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 12:42:58,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:42:58,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:42:58,889 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 12:42:58,890 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 12:42:58,890 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_651302ab-a5f4-4828-a523-0321e2f47c99/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 12:42:58,903 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-23 12:42:58,921 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-23 12:42:58,921 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 12:42:58,923 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 12:42:58,942 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 12:42:58,965 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 12:42:58,966 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-11-23 12:42:58,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-23 12:42:58,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-23 12:42:58,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-23 12:42:58,966 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 4 states. [2018-11-23 12:42:58,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 12:42:58,983 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2018-11-23 12:42:58,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-23 12:42:58,983 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2018-11-23 12:42:58,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 12:42:58,984 INFO L225 Difference]: With dead ends: 28 [2018-11-23 12:42:58,984 INFO L226 Difference]: Without dead ends: 20 [2018-11-23 12:42:58,984 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-23 12:42:58,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-11-23 12:42:58,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2018-11-23 12:42:58,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-11-23 12:42:58,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-11-23 12:42:58,987 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 17 [2018-11-23 12:42:58,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 12:42:58,987 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2018-11-23 12:42:58,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-23 12:42:58,988 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2018-11-23 12:42:58,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-11-23 12:42:58,988 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 12:42:58,988 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 12:42:58,988 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 12:42:58,988 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 12:42:58,988 INFO L82 PathProgramCache]: Analyzing trace with hash 345235238, now seen corresponding path program 1 times [2018-11-23 12:42:58,988 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 12:42:58,988 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 12:42:58,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:42:58,989 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 12:42:58,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:42:58,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:42:59,115 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 12:42:59,115 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 12:42:59,115 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_651302ab-a5f4-4828-a523-0321e2f47c99/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 12:42:59,129 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 12:42:59,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:42:59,137 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 12:42:59,260 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 12:42:59,275 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 12:42:59,275 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2018-11-23 12:42:59,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-23 12:42:59,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-23 12:42:59,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2018-11-23 12:42:59,276 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 17 states. [2018-11-23 12:42:59,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 12:42:59,451 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2018-11-23 12:42:59,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-23 12:42:59,451 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 17 [2018-11-23 12:42:59,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 12:42:59,452 INFO L225 Difference]: With dead ends: 40 [2018-11-23 12:42:59,452 INFO L226 Difference]: Without dead ends: 28 [2018-11-23 12:42:59,453 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2018-11-23 12:42:59,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-11-23 12:42:59,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2018-11-23 12:42:59,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-11-23 12:42:59,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2018-11-23 12:42:59,456 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 17 [2018-11-23 12:42:59,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 12:42:59,456 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2018-11-23 12:42:59,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-23 12:42:59,456 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2018-11-23 12:42:59,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-11-23 12:42:59,457 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 12:42:59,457 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 12:42:59,457 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 12:42:59,457 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 12:42:59,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1034664986, now seen corresponding path program 2 times [2018-11-23 12:42:59,457 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 12:42:59,458 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 12:42:59,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:42:59,458 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 12:42:59,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:42:59,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:42:59,530 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 12:42:59,530 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 12:42:59,530 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_651302ab-a5f4-4828-a523-0321e2f47c99/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 12:42:59,544 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-23 12:42:59,552 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-23 12:42:59,552 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 12:42:59,553 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 12:42:59,564 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 12:42:59,578 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 12:42:59,578 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-11-23 12:42:59,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-23 12:42:59,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-23 12:42:59,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-23 12:42:59,579 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 6 states. [2018-11-23 12:42:59,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 12:42:59,607 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2018-11-23 12:42:59,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-23 12:42:59,607 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2018-11-23 12:42:59,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 12:42:59,608 INFO L225 Difference]: With dead ends: 37 [2018-11-23 12:42:59,608 INFO L226 Difference]: Without dead ends: 29 [2018-11-23 12:42:59,608 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-23 12:42:59,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-11-23 12:42:59,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2018-11-23 12:42:59,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-11-23 12:42:59,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2018-11-23 12:42:59,612 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 23 [2018-11-23 12:42:59,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 12:42:59,612 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2018-11-23 12:42:59,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-23 12:42:59,613 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2018-11-23 12:42:59,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-11-23 12:42:59,613 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 12:42:59,613 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 12:42:59,614 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 12:42:59,614 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 12:42:59,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1744570554, now seen corresponding path program 3 times [2018-11-23 12:42:59,614 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 12:42:59,614 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 12:42:59,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:42:59,615 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 12:42:59,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:42:59,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:42:59,723 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-11-23 12:42:59,723 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 12:42:59,723 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_651302ab-a5f4-4828-a523-0321e2f47c99/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 12:42:59,729 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 12:42:59,735 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-11-23 12:42:59,736 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 12:42:59,737 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 12:42:59,829 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-11-23 12:42:59,844 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 12:42:59,844 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2018-11-23 12:42:59,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-23 12:42:59,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-23 12:42:59,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2018-11-23 12:42:59,845 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 14 states. [2018-11-23 12:42:59,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 12:42:59,986 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2018-11-23 12:42:59,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-23 12:42:59,987 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-11-23 12:42:59,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 12:42:59,987 INFO L225 Difference]: With dead ends: 42 [2018-11-23 12:42:59,987 INFO L226 Difference]: Without dead ends: 31 [2018-11-23 12:42:59,988 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2018-11-23 12:42:59,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-11-23 12:42:59,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2018-11-23 12:42:59,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-23 12:42:59,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-11-23 12:42:59,992 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 26 [2018-11-23 12:42:59,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 12:42:59,992 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-11-23 12:42:59,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-23 12:42:59,993 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-11-23 12:42:59,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-11-23 12:42:59,993 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 12:42:59,993 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 12:42:59,993 INFO L423 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 12:42:59,993 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 12:42:59,993 INFO L82 PathProgramCache]: Analyzing trace with hash 45653034, now seen corresponding path program 4 times [2018-11-23 12:42:59,994 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 12:42:59,994 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 12:42:59,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:42:59,994 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 12:42:59,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 12:43:00,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 12:43:00,111 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-11-23 12:43:00,111 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 12:43:00,111 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_651302ab-a5f4-4828-a523-0321e2f47c99/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 12:43:00,116 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-23 12:43:00,126 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-23 12:43:00,126 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 12:43:00,127 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 12:43:00,307 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 12:43:00,322 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-23 12:43:00,322 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 25 [2018-11-23 12:43:00,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-23 12:43:00,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-23 12:43:00,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2018-11-23 12:43:00,323 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 25 states. [2018-11-23 12:43:00,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 12:43:00,717 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2018-11-23 12:43:00,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-23 12:43:00,717 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2018-11-23 12:43:00,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 12:43:00,717 INFO L225 Difference]: With dead ends: 38 [2018-11-23 12:43:00,718 INFO L226 Difference]: Without dead ends: 0 [2018-11-23 12:43:00,719 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=213, Invalid=1679, Unknown=0, NotChecked=0, Total=1892 [2018-11-23 12:43:00,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-23 12:43:00,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-23 12:43:00,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-23 12:43:00,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-23 12:43:00,719 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2018-11-23 12:43:00,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 12:43:00,719 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-23 12:43:00,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-23 12:43:00,719 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-23 12:43:00,719 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-23 12:43:00,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-23 12:43:00,794 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-23 12:43:00,794 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-23 12:43:00,794 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-23 12:43:00,794 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-23 12:43:00,794 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-23 12:43:00,794 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-23 12:43:00,795 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 10 22) the Hoare annotation is: true [2018-11-23 12:43:00,795 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 10 22) no Hoare annotation was computed. [2018-11-23 12:43:00,795 INFO L448 ceAbstractionStarter]: For program point L20(line 20) no Hoare annotation was computed. [2018-11-23 12:43:00,795 INFO L448 ceAbstractionStarter]: For program point L16(lines 16 18) no Hoare annotation was computed. [2018-11-23 12:43:00,795 INFO L448 ceAbstractionStarter]: For program point L14(line 14) no Hoare annotation was computed. [2018-11-23 12:43:00,795 INFO L448 ceAbstractionStarter]: For program point L15-2(lines 15 19) no Hoare annotation was computed. [2018-11-23 12:43:00,795 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 10 22) no Hoare annotation was computed. [2018-11-23 12:43:00,795 INFO L444 ceAbstractionStarter]: At program point L15-3(lines 15 19) the Hoare annotation is: (let ((.cse1 (* 2 main_~n~0))) (let ((.cse2 (<= 0 main_~i~0)) (.cse4 (<= main_~i~0 .cse1)) (.cse3 (<= main_~n~0 main_~k~0))) (or (let ((.cse0 (+ main_~i~0 1))) (and (<= .cse0 .cse1) .cse2 (<= .cse1 .cse0) .cse3)) (and (<= main_~n~0 0) .cse4 (= main_~i~0 0)) (and .cse2 .cse4 (<= .cse1 main_~i~0) .cse3)))) [2018-11-23 12:43:00,795 INFO L444 ceAbstractionStarter]: At program point L15-4(lines 15 19) the Hoare annotation is: (let ((.cse0 (<= main_~k~0 main_~n~0))) (or (and (<= main_~n~0 0) .cse0) (and .cse0 (<= main_~n~0 main_~k~0)))) [2018-11-23 12:43:00,795 INFO L448 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-11-23 12:43:00,795 INFO L451 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2018-11-23 12:43:00,795 INFO L448 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2018-11-23 12:43:00,795 INFO L448 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-11-23 12:43:00,796 INFO L448 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-11-23 12:43:00,796 INFO L448 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2018-11-23 12:43:00,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 12:43:00 BoogieIcfgContainer [2018-11-23 12:43:00,803 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-23 12:43:00,804 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-23 12:43:00,804 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-23 12:43:00,804 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-23 12:43:00,804 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:42:58" (3/4) ... [2018-11-23 12:43:00,806 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-23 12:43:00,811 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-23 12:43:00,811 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-23 12:43:00,811 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2018-11-23 12:43:00,814 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2018-11-23 12:43:00,814 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2018-11-23 12:43:00,814 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-23 12:43:00,843 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_651302ab-a5f4-4828-a523-0321e2f47c99/bin-2019/uautomizer/witness.graphml [2018-11-23 12:43:00,843 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-23 12:43:00,844 INFO L168 Benchmark]: Toolchain (without parser) took 3213.29 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 172.5 MB). Free memory was 959.3 MB in the beginning and 1.2 GB in the end (delta: -203.5 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 12:43:00,844 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 12:43:00,845 INFO L168 Benchmark]: CACSL2BoogieTranslator took 140.22 ms. Allocated memory is still 1.0 GB. Free memory was 959.3 MB in the beginning and 948.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-23 12:43:00,845 INFO L168 Benchmark]: Boogie Procedure Inliner took 12.39 ms. Allocated memory is still 1.0 GB. Free memory is still 948.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 12:43:00,845 INFO L168 Benchmark]: Boogie Preprocessor took 12.65 ms. Allocated memory is still 1.0 GB. Free memory was 948.5 MB in the beginning and 945.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-23 12:43:00,845 INFO L168 Benchmark]: RCFGBuilder took 203.25 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 134.2 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -174.2 MB). Peak memory consumption was 14.2 MB. Max. memory is 11.5 GB. [2018-11-23 12:43:00,845 INFO L168 Benchmark]: TraceAbstraction took 2802.24 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 38.3 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -44.1 MB). Peak memory consumption was 254.8 MB. Max. memory is 11.5 GB. [2018-11-23 12:43:00,846 INFO L168 Benchmark]: Witness Printer took 39.62 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. [2018-11-23 12:43:00,847 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 140.22 ms. Allocated memory is still 1.0 GB. Free memory was 959.3 MB in the beginning and 948.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 12.39 ms. Allocated memory is still 1.0 GB. Free memory is still 948.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 12.65 ms. Allocated memory is still 1.0 GB. Free memory was 948.5 MB in the beginning and 945.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 203.25 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 134.2 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -174.2 MB). Peak memory consumption was 14.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2802.24 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 38.3 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -44.1 MB). Peak memory consumption was 254.8 MB. Max. memory is 11.5 GB. * Witness Printer took 39.62 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 15]: Loop Invariant Derived loop invariant: ((((i + 1 <= 2 * n && 0 <= i) && 2 * n <= i + 1) && n <= k) || ((n <= 0 && i <= 2 * n) && i == 0)) || (((0 <= i && i <= 2 * n) && 2 * n <= i) && n <= k) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 21 locations, 1 error locations. SAFE Result, 2.7s OverallTime, 8 OverallIterations, 6 TraceHistogramMax, 0.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 91 SDtfs, 70 SDslu, 395 SDs, 0 SdLazy, 783 SolverSat, 56 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 228 GetRequests, 109 SyntacticMatches, 13 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 15 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 17 PreInvPairs, 31 NumberOfFragments, 71 HoareAnnotationTreeSize, 17 FomulaSimplifications, 298 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 112 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 274 NumberOfCodeBlocks, 265 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 260 ConstructedInterpolants, 0 QuantifiedInterpolants, 34827 SizeOfPredicates, 14 NumberOfNonLiveVariables, 296 ConjunctsInSsa, 80 ConjunctsInUnsatCore, 14 InterpolantComputations, 2 PerfectInterpolantSequences, 66/238 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...